Upgrade your late-night Taco B run for a stop at Taco C. This San Antonio-based Mexican chain makes its tortillas to order and four varieties of salsas fresh every day. There’s plenty of crunchy-fried fare, but on the healthier side, there are soft tacos, salads and citrus-marinated rotisserie chicken. And what was the last fast food joint you went to that served beer and Margaritas?